What is cadence in a poem?

the loudness or softness of the voice

the rate of speed at which the poem is read

the flow of the poem's stressed and unstressed syllables

the emphasis of words through a change of pace

the emphasis of words through a change of pace
 Cadence in poetry refers to the rising and the falling of the voice when reading a literary piece. Simply it comes from the Latin word “cadentia” that means “a falling”, hence the reason for its definition.  In poetry, it refers to the pitch and rhythm of the literary piece.  Cadence also helps in the setting the rhythmic paces of literary pieces. The imperfect and the perfect cadence are the two types of cadence.